A coding device and a decoding device are configured to include an estimated prediction mode deciding section (122a) including: a reference block selecting section (1223a) for selecting a reference block for use in estimating an intra-prediction mode for a subject block; an estimating number deciding section (1222a) for deciding an estimating number of estimated values to be estimated for the intra-prediction mode; and an estimated prediction mode deriving section (1221a) for estimating, based on a reference block, the estimating number of estimated values of the prediction mode.
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2. The method of claim 1, wherein the adjacent blocks comprise two adjacent blocks.
5. The method of claim 1, wherein the flag comprises a one bit value that is set to 0 to indicate that the prediction mode is not one of the candidate prediction modes.
9. The image-encoding device of claim 8, wherein the adjacent blocks comprise two adjacent blocks.
12. The image-encoding device of claim 8, wherein the flag comprises a one bit value that is set to 0 to indicate that the prediction mode is not one of the candidate prediction modes.
16. The non-transitory computer-readable medium of claim 15, wherein the adjacent blocks comprise two adjacent blocks.
19. The non-transitory computer-readable medium of claim 15, wherein the flag comprises a one bit value that is set to 0 to indicate that the prediction mode is not one of the candidate prediction modes.
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January 30, 2023
July 9, 2024
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